#3F3DAE
Closest named color: Sapphire (#2138AB). oklch(43.6% 0.175 277.1), rgb(63, 61, 174).
Aa
White text reads best on this color (8.43:1).
About this color
#3F3DAE is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.175 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.042 away. White text reads best on it, at 8.43:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.49:1 |
| White text | 8.43:1 |
Values
| HEX | #3F3DAE |
| RGB | rgb(63, 61, 174) |
| HSL | hsl(241, 48%, 46%) |
| OKLCH | oklch(43.6% 0.175 277.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3F3DAE | 8.43:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #3F3DAE | 2.49:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #3F3DAE text on white | 8.43:1 | AAA | Lc 88.5 | Fine for body text |
| #3F3DAE text on black | 2.49:1 | Fails | Lc -13.7 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD6FF
oklch(88.4% 0.057 277.5)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#6F75FF
oklch(63% 0.201 277.1)
-
Step 600
600
#5A57F3
oklch(55.6% 0.226 277)
-
Step 700
700
#4B45D4
oklch(49.1% 0.211 277.1)
-
Step 800
800 (this color)
#3F3DAE
oklch(43.6% 0.175 277.1)
-
Step 900
900
#333487
oklch(37.7% 0.135 277.2)
-
Step 950
950
#1D1F4F
oklch(26.9% 0.086 277.1)
#3F3DAE with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #0052B2 | 0.062 |
| Deuteranopia (no green cones) | #0048AC | 0.053 |
| Tritanopia (no blue cones) | #005A70 | 0.145 |
| Achromatopsia (no color) | #4D4D4D | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3DAE
#3F3DAE
oklch(43.6% 0.175 277.1)
- #5F5100
#5F5100
oklch(43.6% 0.09 97.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3F3DAE, closest first.
No curated palette has a color within ΔE 0.04 of #3F3DAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.042
- Blueberry #464196 ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Blue Blue #2242C7 ΔE 0.051
- Blurple #5539CC ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.063
Use #3F3DAE in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.